safelight

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safelight

[′sāf‚līt]
(graphic arts)
A darkroom light of a particular color that will not affect the sensitive material being handled; for example, blue-sensitive materials require a red, orange, or yellow safelight.
References in periodicals archive ?
Unexposed and unprocessed film must be handled under dark green safelights. The film's silver and polyester are recoverable.
Maybe the darkroom, with its safelights and storage, should be separate from the processing?
The video recording equipment and safelights were connected to a power supply with battery back-up.